Cavity Quantum Electro-Optic Transduction

Rahaf Youssef, Zorzetti, Silvia, Changqing Wang

Mankei Tsang

Mohan Shen, Manuel C. C. Pace, Hong X. Tang

High-efficiency microwave-to-optical quantum transduction is crucial for quantum networks and distributed quantum computing. Cavity-based electro-optic transducers have been widely explored due to their cavity-enhanced conversion efficiency, albeit at the compromise of limited transduction bandwidth and strict frequency alignment requirements between microwave and optical modes. A recent advancement in meter-long superconducting electro-optic modulators (SEOM) has demonstrated conversion efficiency approaching that of the cavity-based transducers on a traveling-wave structure while maintaining a broad bandwidth of tens of gigahertz. This paper provides a further theoretical investigation into the dynamics of the microwave-to-optical conversion process in a traveling-wave geometry. Based on this analysis, we propose a traveling-wave electro-optic transducer design featuring near-unity conversion efficiency and tunable conversion frequency.

Timothy C. Ralph, Ping Koy Lam, Elanor H. Huntington +3 more

Mihir Khanna, Yang Hu, C. Ligato +1 more

We are performing electro-optic quantum transduction by developing dielectric, centimeter-scale microwave photonic crystal cavities with high Q/V coupled to LiNbO3 nonlinear optical resonators at room temperature.

Shuhang Zheng, Junyin Zhang, Jiachen Cai +6 more

We demonstrate bidirectional millimeter-wave–optical transduction in a triply resonant cavity electro-optic system on thin-film lithium tantalate, showing single-photon coupling rate of g 0 = 2 π × 3.11 kHz at 59.33 GHz, transduction efficiency of 2.5%, and resolved room-temperature Johnson noise.